Re: [Xen-devel] domU guest for xcp 0.1.1

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Apr 05, 2010 at 09:00:59PM -0700, Ritu kaur wrote:
>    Thanks Konrad.
> 
>    I downloaded new code and still doesn't work(albeit different problem). I
>    will enumerate them below
> 
>    (Please note 1, 2 and 3 are seen with old xen/next as well). What seemed
>    simple testing of pci passthrough via config changes doesn't seem to be
>    the case.
> 
>    1. mkinitrd doesn't work in xcp ddk. I get below errors
> 
>    mkinitrd -f ./initrd-2.6.32.ing 2.6.32
>    modinfo: could not find module ide-disk
>    No module ide-disk found for kernel 2.6.32, aborting.
>

Did you install the modules after you compiled the kernel? 
Did you run "depmod -a <kernelversion>" ? 
 
>    I copied ide-disk.ko from
>    
> /lib/modules/2.6.27.42-0.1.1.xs0.1.1.737.1065xen/kernel/drivers/ide/ide-disk.ko(just
>    to check what other errors arise from mkinitrd in xcp ddk), I get
> 

You can't modules from a different kernel version!!!

>    mkinitrd -f ./initrd-2.6.32.ing 2.6.32
>    modinfo: could not find module ide-disk
>    modinfo: could not find module dm-mem-cache
>    modinfo: could not find module dm-message
>    modinfo: could not find module dm-raid45
> 

Looks like you didn't install the modules from the new kernel.

>    2. Looked into .config I have(generated via make menuconfig) and there
>    isn't anything on IDEDISK. I cross checked config file that comes with xcp
>    source code it has
>    ...
>    CONFIG_BLK_DEV_IDEDISK=m
>    CONFIG_IDEDISK_MULTI_MODE=y
>    ...
>

XCP default kernel is 2.6.27. You're trying to use 2.6.32. 
There might have been changes between the kernel versions.
 
>    I copied above configs into my .config and when I run make(it asks some
>    IDE config related questions ) and these configs are deleted after that. I
>    have tried all options "y/n/m" to the questions and same result.
> 
>    3. I downloaded .config file from
>    
> [1]http://pasik.reaktio.net/xen/pv_ops-dom0-debug/config-2.6.32.10-pvops-dom0-xen-stable-x86_32
> 
>    there isn't IDEDISK config in it either and in addition "make tar-pkg"
>    doesn't work with this .config file. I get following errors
> 

If ide-disk module is not used/required anymore in 2.6.32, then you should
remove it from /etc/modprobe.conf so that mkinitrd doesn't try to include it!

(replace it with the proper new module name).

>    DEPMOD  2.6.32
> 
>    /bin/sh: line 1:  3341 Killed                  /sbin/depmod -ae -F
>    System.map -b /root/kernel/linux-2.6.32/tar-install 2.6.32
>    make[3]: *** [_modinst_post] Error 137
>    make[2]: *** [sub-make] Error 2
>    make[1]: *** [tar-pkg] Error 2
>    make: *** [tar-pkg] Error 2
> 
>    4. I tried with the vmlinuz and initrd image built from "2" above(I know
>    initrd image is not correct, I just wanted to try) and I get
> 
>    [0.000000] ERROR: Unable to locate IOAPIC for GSI 2
>    [0.000000] ERROR: Unable to locate IOAPIC for GSI 9
>    [0.000000] ERROR: Unable to locate IOAPIC for GSI 2
>    [0.000000] ERROR: Unable to locate IOAPIC for GSI 9
>    [0.493572] registering netback
>    Red Hat nash version 5.1.19.6 starting
>    einsmod: error inserting 'lib/ide-disk.ko': -1 Invalid module format
>

"Invalid module format" means it's from a different kernel and cannot be
used with this kernel.

>    indmos: error inserting '/lib/dm-region-hash.ko': -1 File Exists
>    mount: could not fine filesystem '/dev/root'
>    setuproot: moving /dev failed: No such file or directory
>    setuproot: error mounting /proc: No such file or directory
>    setuproot: error mounting /sys: No such file or directory
>    switchroot: mount failed: No such file or directory
>    [0.905987] Kernel panic - not syncing: Attempted to kill init!
> 
>    Let me know how to proceed on this.
>

Install for example Fedora 12, or any other distro that has 2.6.32 kernel
as a default, and check which modules are used for your hardware,
then replace "ide-disk" in modprobe.conf with the actual module.

-- Pasi

 
>    Thanks
> 
>    On Mon, Apr 5, 2010 at 10:00 AM, Konrad Rzeszutek Wilk
>    <[2]konrad.wilk@xxxxxxxxxx> wrote:
> 
>      On Mon, Apr 05, 2010 at 07:10:22AM -0700, Ritu kaur wrote:
>      > Hello,
>      >
>      > Any inputs folks on xen debugs provided? dom0 crashes when  xen/next
>      kernel
> 
>      What you are hitting should have been fixed a week ago. Are you up to
>      the latest in xen/next? Did you do 'git pull' ? Do you see this as the
>      latest when you do 'git log | head':
> 
>       git log | head -5
>      commit 900f6d725874ca97c21cdc5a2c4e05bd62db4e86
>      Merge: f2530fa 89689b1
>      Author: Jeremy Fitzhardinge <[3]jeremy.fitzhardinge@xxxxxxxxxx>
>      Date:   Thu Apr 1 14:24:30 2010 -0700
> 
> References
> 
>    Visible links
>    1. 
> http://pasik.reaktio.net/xen/pv_ops-dom0-debug/config-2.6.32.10-pvops-dom0-xen-stable-x86_32
>    2. mailto:konrad.wilk@xxxxxxxxxx
>    3. mailto:jeremy.fitzhardinge@xxxxxxxxxx

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